I'm having trouble trying to see where the Hurricane was able to get 95% of their 6,000 claimed out of the BoB.
Well, there is also the BoF , but you are right; it's not plausible that Hurricanes got that many claims/ credits in this period of the war. In fact, seeing as the main action was in the period May-October 1940, RAF pilots would have to have claimed on average more than a 1000 enemy aircraft per month!
Hurricanes being credited with 6000 victories in the ETO simply defies credibility.